| Tournament details | |
|---|---|
| Dates | October 8–27, 1991[1] |
| Teams | 4 |
| Final positions | |
| Champions | Minnesota Twins (3rd title) |
| Runner-up | Atlanta Braves (5th World Series appearance) |
| Tournament statistics | |
| MVP | Jack Morris (MIN) |
The 1991 Major League Baseball postseason was the playoff tournament of Major League Baseball for the 1991 season. The winners of each division advance to the postseason and face each other in a League Championship Series to determine the pennant winners that face each other in the World Series.
In the American League, the Minnesota Twins returned to the postseason for the second time in five years, and the Toronto Blue Jays returned for the third time in the past seven years.
In the National League, the Pittsburgh Pirates made their second consecutive appearance, and the Atlanta Braves made their first postseason appearance since 1982. This marked the first of fourteen consecutive postseason appearances for the Braves franchise from 1991 to 2005, excluding 1994, when the season was cancelled.
This was the first postseason since 1980 to not feature a team from California.
The playoffs began on October 8, 1991, and concluded on October 27, 1991, with the Twins defeating the Braves in seven games in the 1991 World Series. It was the Twins' second title in Minnesota and their third overall.